Reference issue devbridge#385 have prevented attempted pattern matching on empty strings

Author: unknown

src/jquery.autocomplete.js

@@ -127,15 +127,19 @@
     $.Autocomplete = Autocomplete;
 
     Autocomplete.formatResult = function (suggestion, currentValue) {
-        var pattern = '(' + utils.escapeRegExChars(currentValue) + ')';
-        
-        return suggestion.value
-            .replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>')
-            .replace(/&/g, '&amp;')
-            .replace(/</g, '&lt;')
-            .replace(/>/g, '&gt;')
-            .replace(/"/g, '&quot;')
-            .replace(/&lt;(\/?strong)&gt;/g, '<$1>');
+        if (currentValue) {
+            var pattern = '(' + utils.escapeRegExChars(currentValue) + ')';
+            
+            return suggestion.value
+                .replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>')
+                .replace(/&/g, '&amp;')
+                .replace(/</g, '&lt;')
+                .replace(/>/g, '&gt;')
+                .replace(/"/g, '&quot;')
+                .replace(/&lt;(\/?strong)&gt;/g, '<$1>');
+        } else {
+            return suggestion.value;
+        }
     };
 
     Autocomplete.prototype = {